Developer API
Built for developers
Create redline requests, generate member URLs, and embed the editor with a REST API. Webhooks keep your app in sync as parties revise contracts.
Create a redline request
POST /api/v0/redline-requests — start a negotiation from a DOCX template
{
"templateId": "tmpl_abc123",
"members": [
{
"email": "seller@acme.com",
"displayName": "Alex Rivera",
"role": "DisclosingParty"
},
{
"email": "buyer@example.com",
"displayName": "Jamie Chen",
"role": "ReceivingParty"
}
],
"metadata": {
"subject": "Master services agreement"
}
}Generate a member URL
POST /api/v0/redline-requests/{id}/url — embed the editor for a party
{
"memberEmail": "buyer@example.com"
}Embed in your app
Load the returned URL in an iframe or redirect the counterparty
{
"redlineUrl": "https://app.formabledocs.com/redlining/xyz789",
"expiresAt": "2026-07-06T15:00:00.000Z"
}
